Should you run water when pipes are frozen?

Author: Ronny Marvin  |  Last update: Monday, February 23, 2026

Running water through the pipe will help melt more ice. Apply heat to the frozen section of pipe using an electric heating pad wrapped around the pipe, electric hair dryer, a portable space heater (kept away from flammable materials), or by wrapping pipes with towels soaked in hot water.

Can you unfreeze pipes by running water?

Keep the faucet open. As you treat the frozen pipe and the frozen area begins to melt, water will begin to flow through the frozen area. Running water through the pipe will help melt ice in the pipe.

Should I leave my water running during a freeze?

TEXAS, USA — When we reach freezing temperatures, it's typically best practice to keep the water running in your home! Dripping faucets can prevent your pipes from freezing and bursting.

What not to do when pipes freeze?

Do NOT Use These Methods To Thaw Frozen Pipes
  1. Blowtorch.
  2. Gas heater.
  3. Kerosene heater.
  4. Propane heater.
  5. Other open flame appliances.
  6. Any device near insulation.
  7. Electric device with extension cord.
  8. Electric heater, blow dryer, or other device near water.

Do water pipes burst when water running through them freezes?

Water pipes burst because the water inside them expands as it gets close to freezing, and this causes an increase in pressure inside the pipe. When the pressure gets too high for the pipe to contain, it ruptures. This expansion phenomenon seems natural, but interestingly, it is a chemical anomaly.

How to deal with frozen water pipes

Should you shut your water off if your pipes freeze?

But if they have running water, it's likely your pipes have frozen. Turn off the water immediately at the main shut off valve. Open the faucet so that water will flow through the pipe once the area is melted. This will help melt more ice.

How long can pipes stay frozen without bursting?

Pipes typically burst when exposed to extremely low temperatures for an extended period of time (anywhere from 1-3 days depending on temperature). This is especially true for pipes located on exterior walls. A frozen pipe is likely to burst when any water or liquid trapped within it freezes and begins to expand.

Do you run hot or cold water when it freezes?

Cold Weather Precautions
  1. It's important to remember that both hot and cold water pipes may freeze. ...
  2. Let the water run — Leaving a small but steady stream of lukewarm water running will keep the water moving through the pipes.

Do you drip faucets during a freeze?

Should You Drip Faucets In Cold Weather? Yes, according to the Red Cross, the short answer to that question is you should.

Will frozen pipe burst if the faucet is open?

It's important to note that you shouldn't fully open your faucets and plumbing fixtures directly after a freeze. This will drastically increase the water pressure within the pipes if there is any frozen water inside them, causing the pipes to burst.

How to tell if water pipes are frozen?

Any exposed pipes that have frost, condensation or bulging sections are likely frozen.

What do I do if my pipes are still frozen after 2 days?

If your pipes have been frozen for more than two days, shut down your home's water supply. Locate the frozen length using touch, sight and sound. Make sure the pipe hasn't burst, and open indoor faucets. Unfreeze the pipe using a hair dryer, heat tape, space heater or heating pad.

How to thaw frozen pipes without bursting?

Manually thaw: Begin the thawing process at the most vulnerable places (near faucets). By targeting these areas first, your pipes will be less likely to burst. To do so, gently apply heat to the frozen areas. A blow dryer is a good option (use caution, go slowly, and don't use an open flame).

Should you leave faucets open when water is turned off?

Pipes: Turn off water supply to the house and drain pipes to protect them from freezing. You can empty pipes by running the water and flushing the toilets after the water has been turned off. After draining the pipes, it is a good idea to leave the faucets open to prevent pressure build up from any water that remains.

Will pouring hot water down drain unfreeze pipes?

The job goes more quickly by pouring hot water or a mixture of vinegar, baking soda and salt water down the drain. Space heaters, hair dryers and heating pads are highly efficient tools for unfreezing a drain pipe. If a frozen drain line ruptures, turn off your home's main water supply.

Will water run through frozen pipes?

If you turn on a faucet after a very cold night and only a trickle comes out, chances are good that ice has formed inside a water pipe, blocking the flow of water. Don't panic. Just because pipes are frozen doesn't mean they've burst.

Will a frozen pipe thaw on its own?

Your pipes will eventually begin to thaw on their own once the temperatures rise above freezing. As they do so, you may begin to hear your pipes making gurgling, clanging, or banging sounds as the ice begins to move. The hot water heater may do the same.

When to leave water running?

Leave the water dripping until temperatures are consistently above 20 degrees Fahrenheit and you've checked for frozen pipes. With water movement in your pipes, ice is less likely to form, and your pipes are less likely to burst.

Should you run water when its freezing?

Keep the faucet open. As you treat the frozen pipe and it begins to melt, water will begin flowing through the frozen area. Running water will help melt more ice in the pipe. Apply heat to the frozen section of the pipe using an electric heating pad, hair dryer or portable space heater.

How to tell if a water heater is frozen?

If you suspect your water heater may be frozen, touch the outside of the unit with your hand until you locate a spot where it's ice cold. If you don't find such a spot on the tank or tankless unit, you may have ice in the pipes leading in and out of the unit rather than in the heater itself.

Can pipes freeze in one night?

Yes, pipes can freeze overnight if temperatures plummet drastically. Uninsulated pipes in unheated areas like attics or exterior walls are most vulnerable.

How to tell if a water line is frozen?

Low Water Pressure: if you normally don't have issues with low water pressure and then all of a sudden the faucets and shower heads are reduced to a trickle, or no flow of water at all, this could also be a sign there's a blockage due to ice somewhere in the pipes.

Does homeowners insurance cover burst pipes from freezing?

Most homeowner and commercial property insurance policies, in general, will cover damage from a frozen pipe that bursts.

Will a running water hose freeze?

As you winterize, it's very important to remember to disconnect the hose for winter. A hose connected to an outside faucet is exposed to the elements. The water inside the hose can rapidly freeze when the temperature drops below 32 degrees.

Previous article
What to do when silver oxidizes?
Next article
How much Freon does a home AC unit hold?